Troch·i·li n. pl.  Zool. A division of birds comprising the humming birds.
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  Troch·i·lus n.; pl. Trochili
  1. Zool. (a) A genus of humming birds. It Formerly included all the known species. (b) Any one of several species of wrens and kinglets. [Obs.] (c) The crocodile bird.
  2. Arch. An annular molding whose section is concave, like the edge of a pulley; -- called also scotia.
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